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Effect of Temperature on the Development of Orius albidipennis Reuter, a Predator of the African Legume Flower Thrips, Megalurothrips sjostedti Trybom

Published online by Cambridge University Press:  19 September 2011

L.M. Gitonga
Affiliation:
Department of Zoology, Jomo Kenyatta University of Agriculture and Technology, P. O. Box 62000 Nairobi, Kenya
B. Löhr
Affiliation:
GTZ-IPM Horticulture Project, P. O. Box 41607, Nairobi, Kenya
W. A. Overholt
Affiliation:
International Centre of Insect Physiology and Ecology, P. O. Box 30772, Nairobi 00506, Kenya E-mail: woverholt@icipe.org
J. K. Magambo
Affiliation:
Department of Zoology, Kenyatta University, P. O. Box 43844, Nairobi, Kenya
J. M. Mueke
Affiliation:
Department of Zoology, Kenyatta University, P. O. Box 43844, Nairobi, Kenya
Corresponding
E-mail address:

Abstract

The effects of temperature on the development of Orius albidipennis (Reuter) (Hemiptera: Anthocoridae), reared on its prey, Megalurothrips sjostedti (Trybom) (Thysanoptera: Thripidae), were studied in the laboratory. Nymphal mortality was 87, 48 and 38 % at 20, 25 and 30 °C, respectively. With the exception of first-instar nymphs, percentage mortality was lowest at 25 °C. Pre-oviposition period and longevity decreased with an increase in temperature. Mean daily and total fecundity were 2.1 and 76.4 respectively at 25 CC. The mean developmental period from oviposition to adult eclosion was 27.7, 14.1 and 10.9 days at 20, 25 and 30 °C respectively. There was a linear relationship between temperature and developmental rate (1/day) of O. albidipennis. Lower thermal thresholds were 13.8, 13.5, 12.7, 15.0, 13.8 and 12.5 °C for eggs and nymphal stages 1 to 5, respectively, with the corresponding average degree-day requirement of 46.9, 42.6, 33.3, 29.2, 26.1 and 51.4 days, respectively. The implications of these results for biological control of thrips are discussed.

Résumé

Les effets de la température sur le développement d'Orius albidipennis (Reuter) (Hemiptera: Anthocoridae) élevé sur sa proie, Megalurothrips sjostedti (Trybom) (Thysanoptera: Thripidae), ont été étudiés au laboratoire. La mortalité des nymphes est respectivement de 87,48 et 38% à 20, 25 et 30 °C. A l'exception de la nymphe de ler stade, la mortalité est plus faible à 25 °C. La durée de pre-oviposition et la longévité diminuent lorsque la temperature augmente. La fécondité moyenne journalière et totale sont respectivement de 2,1 et 76,4 à 25 °C. La durée moyenne de développement de l'oviposition à l'émergence de l'adulte est respectivement de 27,7,14,1 et 10,9 jours à 20, 25 et 30 °C. II existe une relation linéaire entre le temperature et le taux de développement (1/jour) d'Orius albidipennis. Les seuils thermiques de développement inférieurs sont respectivement de 13,8, 13,5, 12,7, 15,0, 13,8 et 12,5 °C pour l'oeuf et les stades nymphaux 1 à 5 avec respectivement un besoin moyen en degrés jours de 46,9,42,6,33,3,29,2,26,1 et 51,4 jours. On discute des conséquences de ces résultats sur la lutte biologique contre les thrips.

Type
Research Articles
Copyright
Copyright © ICIPE 2002

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Effect of Temperature on the Development of Orius albidipennis Reuter, a Predator of the African Legume Flower Thrips, Megalurothrips sjostedti Trybom
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